What popular Korean dish consists of flanken-cut beef short ribs marinated in a sweet and savory soy-based sauce and then grilled?

Galbi

Galbi is a staple of Korean barbecue and is often prepared using a "LA-style" cut that slices across the rib bones. The marinade typically includes soy sauce, sugar, garlic, and pear juice, which helps to tenderize the meat before grilling.